The Genotypic Profile of Milk Proteins in Cattle Populations Createdon the Mother Base of the Lebedinian Breed

A study of polymorphism of individual genes of milk proteins (kappa-casein and beta- casein) was carried out on the population of cows of the ukrainian brown dairy breed and the sumy interbreed type of the ukrainian black and white dairy breed. Animals of the ukrainian brown dairy breed prevailed in terms of BB genotypes, both for the kappa-casein and genotypes А2А2 for beta-casein genes. According to the complex genotypes of kappa-casein and beta-casein, a difference was established between the animals of the studied breeds. In animals of the ukrainian brown dairy breed a higher frequency is characteristic of the complex genotype A2A2/BB (0.32), and in cows of the sumy interbreed type of the ukrainian black and white dairy breed – A2A2/AA (0.24) and A1A2/AA (0.24).